fossilshells.nl VS.

issg.org

the invasive species specialist group (issg) is a global network of scientific and policy experts on invasive species, organized under the auspices of the species survival commission (ssc) of the international union for conservation of nature (iucn);the invasive species specialist group, issg aims to reduce threats to natural ecosystems and the native species they contain by increasing awareness of invasive alien species, and of ways to prevent, control or eradicate the exotic species.